891974133 has 32 divisors (see below), whose sum is σ = 1428617600. Its totient is φ = 548114688.

The previous prime is 891974117. The next prime is 891974143. The reversal of 891974133 is 331479198.

It is not a de Polignac number, because 891974133 - 2⁴ = 891974117 is a prime.

It is a super-2 number, since 2×891974133² = 1591235707882203378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891974143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4516 + ... + 42477.

It is an arithmetic number, because the mean of its divisors is an integer number (44644300).

Almost surely, 2^891974133 is an apocalyptic number.

It is an amenable number.

891974133 is a deficient number, since it is larger than the sum of its proper divisors (536643467).

891974133 is a wasteful number, since it uses less digits than its factorization.

891974133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47058 (or 47052 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 891974133 is about 29865.9359973867. The cubic root of 891974133 is about 962.6108519765.

The spelling of 891974133 in words is "eight hundred ninety-one million, nine hundred seventy-four thousand, one hundred thirty-three".